Semi-OT: Nvidia Binary performance under load

All, I posted this to the users list, but didn't get much response and I've been involved in testing of development code, so I figured I'd post here.  I have a Toshiba Tecra A6 laptop with 1Gig of memory and according to the Xorg output, an NVidia Quadro NVS 110M: (II)NVIDIA(0): NVIDIA GPU Quadro NVS 110M (G72GL) at PCI:1:0:0 (GPU-0) (--) NVIDIA(0): Memory: 262144 kBytes (--) NVIDIA(0): VideoBIOS: 05.72.22.54.17 (II) NVIDIA(0): Detected PCI Express Link width: 16X With desktop effects enabled using the latest Nvidia binary driver (and the latest F7 updates), I get poor performance under load.  For example, when Firefox is starting a decent-sized java applet, or when I'm starting a VMWare workstation, I get jerky mouse movement, and pauses on typing / moving windows.  Is this a known issue?  Is there a workaround?  Please let me know if there's anything additional I can provide to help troubleshoot. Thanks, Brian